I have made some changes to the Real Teal theme mostly to make the logo fit in the header, but IMHO, looks great with it. Then, the same edit for my logo on the client side. Nothing special, but I do think the themes are pretty nice now that you can edit them directly (color wise). As a suggestion though, perhaps making the logo fit better without having to edit the css would be a nice function.
(If only, this could be made larger for the forum)